Deno’s Garden

Cornus kousa

Genus Cornus

This source reports 5 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Start around May 22, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on May 21, 2026.

  1. Clean the flesh off the seed

  2. Dry storage

    Duration: 180 daysTemperature: 40°F 4°C

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    8 germinated in this phase.

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  6. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    8 germinated in this phase.

Steps after step 3 run on after germination.

about 9 months from start to sowing. Then 49 days to germinate.

38% germination in 28–49 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cornus p. 123Public domain
Show the original text
Cornus (Cornaceae). Seeds are always in berries so that WC was performed on all seeds before planting. Grinding ahole in the seed coat had no effect in C. kousa germ. best in 40(26% in 5-9 w) for fresh seed, 40(25% in 4-5 w) for another sample of fresh seed, 40(22% in 3-4 w)-70(11%) for seed DS 6 m at 70, and 40(38% in 4-7 w)-70(8%)-40-70(8%) for seed DS 6 m at 40. This shows that DS seed germ. as well as fresh seed. Seed started at 70 germ. in an extended manner, for example 70(3%)-40(7%)-70(11%)-40-70(21%) for fresh seed, so that it is inconvenient although the final percent germinations are comparable to sowing at 40. Outdoor treatment is yet to be tried.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cornus p. 123. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

Protocol 2

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Start around February 1, 2027 for a May 3 last frost.

  1. Clean the flesh off the seed

  2. Cold moist stratification

    Temperature: 40°F 4°C

No stated waiting before sowing. Then 63 days to germinate.

26% germination in 35–63 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cornus p. 123Public domain
Show the original text
Cornus (Cornaceae). Seeds are always in berries so that WC was performed on all seeds before planting. Grinding ahole in the seed coat had no effect in C. kousa germ. best in 40(26% in 5-9 w) for fresh seed, 40(25% in 4-5 w) for another sample of fresh seed, 40(22% in 3-4 w)-70(11%) for seed DS 6 m at 70, and 40(38% in 4-7 w)-70(8%)-40-70(8%) for seed DS 6 m at 40. This shows that DS seed germ. as well as fresh seed. Seed started at 70 germ. in an extended manner, for example 70(3%)-40(7%)-70(11%)-40-70(21%) for fresh seed, so that it is inconvenient although the final percent germinations are comparable to sowing at 40. Outdoor treatment is yet to be tried.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cornus p. 123. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

Protocol 3

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Start around September 3, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 2, 2026.

  1. Clean the flesh off the seed

  2. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  3. Cold moist stratification

    Temperature: 40°F 4°C

about 6 months from start to sowing. Then 35 days to germinate.

25% germination in 28–35 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cornus p. 123Public domain
Show the original text
Cornus (Cornaceae). Seeds are always in berries so that WC was performed on all seeds before planting. Grinding ahole in the seed coat had no effect in C. kousa germ. best in 40(26% in 5-9 w) for fresh seed, 40(25% in 4-5 w) for another sample of fresh seed, 40(22% in 3-4 w)-70(11%) for seed DS 6 m at 70, and 40(38% in 4-7 w)-70(8%)-40-70(8%) for seed DS 6 m at 40. This shows that DS seed germ. as well as fresh seed. Seed started at 70 germ. in an extended manner, for example 70(3%)-40(7%)-70(11%)-40-70(21%) for fresh seed, so that it is inconvenient although the final percent germinations are comparable to sowing at 40. Outdoor treatment is yet to be tried.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cornus p. 123. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

Protocol 4

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Start around December 8, 2026 for a May 3 last frost.

  1. Clean the flesh off the seed

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    11 germinated in this phase.

Steps after step 2 run on after germination.

about 3 months from start to sowing. Then 28 days to germinate.

22% germination in 21–28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cornus p. 123Public domain
Show the original text
Cornus (Cornaceae). Seeds are always in berries so that WC was performed on all seeds before planting. Grinding ahole in the seed coat had no effect in C. kousa germ. best in 40(26% in 5-9 w) for fresh seed, 40(25% in 4-5 w) for another sample of fresh seed, 40(22% in 3-4 w)-70(11%) for seed DS 6 m at 70, and 40(38% in 4-7 w)-70(8%)-40-70(8%) for seed DS 6 m at 40. This shows that DS seed germ. as well as fresh seed. Seed started at 70 germ. in an extended manner, for example 70(3%)-40(7%)-70(11%)-40-70(21%) for fresh seed, so that it is inconvenient although the final percent germinations are comparable to sowing at 40. Outdoor treatment is yet to be tried.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cornus p. 123. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

Protocol 5

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Start around December 21, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on December 20, 2025.

  1. Clean the flesh off the seed

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    3 germinated in this phase.

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    7 germinated in this phase.

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    11 germinated in this phase.

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  6. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 15 months from start to sowing. Germination time not stated; 21 days assumed.

21% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cornus p. 123Public domain
Show the original text
Cornus (Cornaceae). Seeds are always in berries so that WC was performed on all seeds before planting. Grinding ahole in the seed coat had no effect in C. kousa germ. best in 40(26% in 5-9 w) for fresh seed, 40(25% in 4-5 w) for another sample of fresh seed, 40(22% in 3-4 w)-70(11%) for seed DS 6 m at 70, and 40(38% in 4-7 w)-70(8%)-40-70(8%) for seed DS 6 m at 40. This shows that DS seed germ. as well as fresh seed. Seed started at 70 germ. in an extended manner, for example 70(3%)-40(7%)-70(11%)-40-70(21%) for fresh seed, so that it is inconvenient although the final percent germinations are comparable to sowing at 40. Outdoor treatment is yet to be tried.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cornus p. 123. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.